34 lines
824 B
C++
34 lines
824 B
C++
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#include <iostream>
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#include "observer.hpp"
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int main(const int argc, const char * argv[])
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{
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Subject subject("Radio");
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Observer *john = new Observer(subject);
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// Test alerting john as the only subscribed observer
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std::cout << "\nAlerting one observer...\n\n";
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subject.SendMessage("Alert 1\n");
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// Attach a new observer
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Observer joe(subject);
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// Alert all subscribed observers
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std::cout << "\nAlerting all observers...\n\n";
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subject.SendMessage("Alert 2\n");
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std::cout << std::endl;
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// Detach joe from the subject
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joe.Detach();
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// Send another alert to john
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std::cout << "Alerting one observer...\n\n";
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subject.SendMessage("Alert 3\n");
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john->Detach();
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// This alert will not be heard by anyone
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std::cout << "\nAlerting no observers...\n\n";
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subject.SendMessage("Alert 4\n");
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}
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